Wideband lna with output match configurability
AssigneeMurata Manufacturing Co., Ltd.
InventorsPhanindra YERRAMILLI, Emre AYRANCI
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Abstract
Methods and devices to mitigate the detrimental effects of highly capacitive output routes of multiple gain low noise amplifiers on the overall performance of the circuit are disclosed. The disclosed methods and devices implement the same inductive element across the output load in both the low gain and high gain operational modes. Furthermore, such devices implement switches to control the selection of different signal paths for the high gain and low gain mode. The implemented switches are also used to selectively adjust the isolation of the output stage of the LNA.
Claims21
(canceled)
A low noise amplifier comprising:
- an input terminal and an output terminal;
- a first stage coupled to the input terminal;
- a second stage coupled to the first stage and comprising a transistor and an inductive element;
- and
- a capacitor configured to provide a signal path from the first stage to the output terminal;
- wherein the low noise amplifier is configured such that:
- in a first state, a signal passes from the first stage to the output terminal via the transistor, and the inductive element is coupled to the output terminal;
- and
- in a second state, the signal passes from the first stage to the output terminal via the capacitor, and the inductive element remains coupled to the output terminal.
A method of operating a low noise amplifier, the method comprising:
- receiving a signal at a first stage;
- in a first state, passing the signal from the first stage to an output terminal through a transistor while an inductive element is coupled to the output terminal;
- and
- in a second state, passing the signal from the first stage to the output terminal through a capacitor while the inductive element remains coupled to the output terminal.
Dependencies are inferred from the claim text.